Subdrain pipe



Oct. 14, 1941. F. cAfRswELL ET AL SUBDRAIN PIPE Filed July 3l, 1939 57,. mw# m3 O www/fm ,f @w W Patented Oct. 14, 1941 Firman L. Carsweil, Johns Otto W. Schmidt,

on County, Kans., and

Kansas City, Mo.

Application July 31, icssgseri'ai No. 372187,50;

Y solaires; (ci. cil- 11) rlhis invention relates to improvements in subdrain pipe and particularly to sub-drain pipe of the larger sizes for use in rapidly draining large quantities of water from the sub-soil.'

The principal object of thisinvention'is the provision of a sub-drain pipe having two'vertically spaced apart series of inlet openings adjacent the juncture of the cover plate, with the channel, whereby the inow of water to the pipe will not be restricted to decrease lits Yeiiiciency under heavy duty.

Another object of the present invention is the provision of a sub-drain pipe having a transversely corrugated channel member .and a transversely corrugated cover plate, joined together by a pair of parallel angle members, whereby a double series of vertically spaced apart openings are formed to admit water to the channel.

Other objects are simplicity and economy of construction, and eiliciency of operation.

Reference will now be had to the drawing wherein:

Figure 1 is a plan View of a sub-drain pipe, partly broken away, embodying this invention.

Fig. 2 is a vertical longitudinal section, taken on line II-lI of Fig. 1, of the sub-drain pipe with parts broken away for clearness.

Fig. 3 is a vertical cross section taken on line III- III of Fig. 2.

Fig. 4 is an enlarged fragmentary section taken on line IV--IV of Fig. 1.

Fig. 5 is a side elevation of parts shown in Fig. 4.

Fig. 6 is a sectional view showing the angle member positioned with its upper leg extending inwardly; and,

Fig. 7 is a cross sectional View of a modied form wherein the channel is corrugated throughout its circumference.

Throughout the several views, like reference characters designate similar parts, and the numeral I D is a channel member, preferably of semi-circular form and corrugated circumferentially. The corrugations comprise valleys I2 and ridges I 4. In order to produce a smooth bottom I6 for 'the channel, the corrugations are terminated short of the central portion of channel member IIJ, as clearly shown in Figs. 1 and 3.

Each of the upper edges I8 of channel member ID, is cut on a plane disposed at an angle to the plane of the upper edges of the channel.

An angle member 20 is positioned along each of the spaced apart top edges of the channel, with a downwardly extending leg 22 secured to the inner wall of the channel by rivets 24, and

the other legV 26- thereof above said channel.

The plane of the out of `channel edge I8 is outwardly and downwardly, thereby presenting a series of openings 28 which communicate with the channel, and through which water may pass when the pipe is positioned in the sub-soil. By varyingV the angle of cut of vedge I8,` the effective size of theppening may be changed to suit the particular requirements. I

A transversely corrugated cover plate 30, having ridges 34 members 20 by rivets 36, and extends therebeyond to protect the series of openings 38 formed between the cover plate and the angle member. Referringv to'Fig. 5, it Awill be noted that the corrugations of llover plate 30 and channel member I Q, arefso related that the'respective series 38 andi 28fof openings formed thereby, are disposed in offset'relation so that the openings thereof are notI in'vertical`alignment.` I I When`the pipe is "positioned in the sub-soil, the excess water will flow into the channel through the upper openings 38 and also through the lower openings at both sides of the pipe. These double openings will insure the lling of the channel to capacity when the sub-soil becomes saturated. 'Ihe overhanging parts of the pipe serve to protect the openings against clogging, and leg 22 of the angle member, acts as an apron to direct the water passing through openings 38 to a point below openings 28.

This particular arrangement of the channel, angle member, and cover plate, presents a very sturdy structure that will withstand heavy loads passing on the ground surface above the subdrain pipe.

When the upper leg 26 of angle member 2i) is turned inwardly as shown in Fig. 6, the water passing through the upper series of openings, will be directed inwardly to inner edge of leg 25 from which it will fall into the channel. The lower series of openings 28 will be substantially the same as shown in the preferred form.

In Fig. 7 the structure is the same as that shown in Fig. 3, with the exception that the corrugations are continuous throughout the width of the channel, thus adding strength to the structure, however, in this form some water may collect in the valleys to cause rusting of the channel.

The parts have been shown as secured together by means of rivets, however, any other suitable means, such as bolting, welding, etc., may be substituted therefor.

extending outwardly,

and valleys 32, is secured to angle to provide a sub-drain pipe having vertically .e spaced apart series of inlet openings provided with overhanging ledges to prevent cloggingor the openings, and some variations mightY be made in the general structureof therdeyice-without departing from the spirit of the invention.

Having thus described the invention;Wh-atiiis claimed as new and desired to be secured by Letters Patent is:

V1. A sub-drain pipe comprising a substantially semi-circular channel, circumferentially corrugated and having its longitudinal marginalend surfaces positioned in-planes disposed obliquely to a plane' determined by the inner edges of the marginal end surfaces; an angle member secured along each of said marginal edges to form a 'Ways .4..A sub-drain pipe comprising an elongated j channel vof substantially semi-circular cross sectional area having circumferentially disposed Y corrugations; an angle member fitted over each series of inletv openings betweenv the angle member and the inner channel wall with one leg of the angle member extending outwardly thereabove; and a transversely corrugated cover plate secured adjacentits edges to said angle members respectively, to form a series'V of inlet openings Vbetween the cover plate and the leg.

y2.'A sub-drain pipe comprising an elongated channel ofsubstantially semi-circular cross sectional area andcorrugated circumerentially; an

angle member secured by one of its legs toeach of the inner marginal walls of said channel to form a series of inlet 'openingsftherebetween and a transversely corrugated cover plate carried by said angle members to vform a series of n.. oi)

of the marginal edges of said channel with one leg thereof extending downwardly inside of said channel and with its other leg positioned above and extending 'outwardly from each margin of said channeLto form a series lof -vertically'disposed inlet passageways beneath said angle member; and a transversely corrugated' cover plate secured'to said angle 'members with its marginal edge portions extending respectively therebeyond to form a series of horizontally disposed inlet passageways above said angle member.

5. Asub-drain'pipe comprising an elongated channel transversely corrugated with obliquely disposed edge surfaces and a transversely corrugated overlapping cover member carried by said channel with angle nmembers positioned therebetween 'along the marginal edges of the channel whereby horizontally disposed. inlet passageways to the pipeV are provided above said angle membersand verticallyv disposed inlet passageways are providedbelow said angle members.

VFIRMAN L. CARSWELL.

oTTo w. soHMIDT.- Y 

